Dolmar PS-351 manual

1 Operator’s and Safety Manual for Gasoline Chain Saws W ARNING! Read and understand this Manual. Always follow safety precautions in the Operator’s and Safety Manual. Improper use can cause serious injury! Preserve this Manual carefully! W ARNING! FUELS WITH MORE THAN 10% ETHANOL ARE NOT APPROVED FOR USE IN DOLMAR 2-STROKE ENGINES! Use of alte[...]

2 EMISSIONS COMPONENT DEFECT W ARRANTY COVERAGE DOLMAR warrant to the initial retail purchaser and each subsequent owner , that this utility equipment was designed, built, and equipped to conform at the time of initial sale to all applicable regulations of the U.S. Environmental Protection Agency (EP A), and that the engine is free of defects in ma[...]

3 The PS-351, PS-421 will be delivered in a protective cardboard box to prevent transport damage. Cardboard is a basic raw material and is consequently reuseable or suitable for recycling (waste paper recycling). W ARNING ! Careless or improper use of this product can cause serious or even fatal injury . Before operating a chain saw or other DOLMAR[...]

4 1 4 5 6 7 3 2 Delivery inventory Symbols Y ou will notice the following symbols on the chain saw and in the Operator’s and Safety Manual: In case one of the parts listed should not be included in the delivery inventory , please consult your sales agent. 1 Chain saw 2 Guide bar 3 Saw chain 4 Chain protection cover 5 Universal wrench 6 Wrench 7 S[...]

5 Saf ety p recau tio ns fo r cha in sa w ope rat ors While operating the chain saw please observe the following rules: a) Contact of the guide bar nose with any object should be avoided. b) T ip contact may cause the guide bar to move suddenly upward and backward, which may cause serious or fatal injury . c) Al way s op er ate t he c hai n sa w wi[...]

6 1 2 max. CKA 45 O max. CKA 40 O C US General Safety Precautions The use of any chain saw may be hazardous. At full throttle chain speed can reach 45 mph (20 m/s). It is important that you read; fully understand and observe the following safety precautions and warnings. Read the Operator’s Manual and the safety instructions periodically . W ARNI[...]

7 3 4 The saw Parts of the chain saw: illustrations and description of parts see page 17. W ARNING ! Never modify a chain saw in any way . Only at- tachments supplied by DOLMAR or expressly approved by DOLMAR for use with the specic saw are authorized. W ARNING ! Bow guide bars substantially increase the potential for kickback and severe or fata[...]

8 6 5 10 feet 5a 6a Chain saw operating instructions For asse mbl y foll ow the pro ced ure in the appr opri ate sec tio n "Mou nti ng Guide Bar and Chai n" of this manu al. DO LM AR ch ain , gu id e b ar an d sp roc ke t m us t ma tch eac h oth er (se e th e a ppr opr iate se cti on in t his ma nua l). W ARNING! Proper tension of the cha[...]

9 7 Important adjustments W ARNING! At correct idle speed, chain should not turn. For di- rections to adjust idle speed, see the appropriate section of this operator’s manual. Do not use a saw with incorrect idle speed adjust- ment. Adjust the idle speed yourself according to the appropriate section of this manual. Have your DOLMAR dealer check y[...]

10 9 10 1 1 12 Po sit io n th e ch ain sa w in su ch a wa y th at yo ur bo dy is clear of the cutting attachment whenever the engine is running (g. 10). Don ’t put pre ssu re on the saw wh en reac hin g t he end of a c ut. T he pre ssur e m ay cau se t he bar an d ro tat ing chain to pop out of the cut or kerf, go out of control and strike the[...]

1 1 13 T o avoid kickback The best protecti on from personal-inj ury that may result from kickback is to avoid kickback situations: 1. Hold the chain saw rmly with both hands and maintain a secure grip. 2. Be aware of the location of the guide bar nose at all times. 3. Never bring the nose of the guide bar in contact with any object. Do not cut [...]

12 16 14 15 T o avoid pushback 1. Be alert to forces or situations that may cause material to pinch the top of the chain. 2. Do not cut more than one log at a time. 3. Do not twist the saw when withdrawing the bar from a plunge cut or under buck cut (gures 25 to 27 and 33, pages 14 and 16), because the chain can pinch. Pull-in: Pull-in occurs wh[...]

13 45° 45° = cutting down area 2 1 2 17 18 19 1/10 ∅ 1/5 ∅ 1 1 / 2 " (4cm) 20 21 22 23 45° First clear the tree base and work area from inter- fering limbs and brush and clean its lower portion an axe (see g. 18). When felling, maintain a distance of at least 2 1/2 tree lengths from the nearest person (see g. 17). Note: Th e n oi [...]

14 1 2 3 24 25 26 27 28 Begin the felling cut slighty higher than the felling notch and on the opposite side of the tree (g. 22). Then cut horizontally through towards the felling notch. Apply the chain saw with its spikes directly behind the uncut portion of wood and cut toward the notch (g. 23). Leave approximately 1/10 of the tree diameter[...]

15 1 2 3 29 30 31 32 W ARNING! There is an extreme danger of kickback at this point. Extra caution must be taken to maintain control of the saw . T o make the felling cut, follow the sectioning method described previously (g. 29). If you are inexperienced with a chain saw plunge-cutting should not be attempted. Seek the help of a professional. L[...]

16 1. Relieving cut 2. Cross cut T ension side Pressure side 1. Relieving cut 2. Cross cut T ension side Pressure side 33 34 35 Maintenance and Repair Never operate a chain saw that is damaged, improperly adjusted or not completely or securely assembled. Follow the maintenance and repair instructions in the appropriate section of this manual. W ARN[...]

17 Denomination of components Indicate when ordering spare parts! Identication plate Serial no. Y ear of manufacture 1 Handle 2 Cover 3 Hood lock 4 T ubular handle 5 Hand guard (release for chain brake) 6 Mufer 7 Spike bar 8 Chain tensioning screw 9 Retaining nuts 10 Chain catch 1 1 Sprocket guard 12 Adjusting screw for oil pump (bottom side)[...]

18 Stroke volume cu. in (cm) 3 2.1 (34,7) 2.6 (42,4) Bore inch (mm) 1.50 (38) 1.65 (42) Stroke inch (mm) 1.20 (30,6) 1.20 (30,6) Max. power at speed hp / rpm 2,3 / 9.500 2,9 / 9.500 Max. torque at speed Nm /rpm 2,1 / 6.500 2,6 / 6.500 Idling speed / max. engine speed with bar and chain rpm 2.800 / 13.500 2.800 / 13.500 Coupling speed rpm 5.100 5.10[...]

19 5 7 6 5 4 1 2 3 STOP Put on the guide bar ( 7 ). Make sure that the pin ( 5 ) of the chain tensioner engages in the hole in the guide bar . Mounting the guide bar and saw chain Use the universal wrench delivered with the chain saw for the following work. Put the chain saw on a stable surface and carry out the following steps for mounting the gui[...]

20 2 4 9 1 1 2 12 3 8 10 9 Replace the sprocket guard ( 3 ). IMPORT ANT : Lift the saw chain over the chain catcher (12). T ighten the nuts ( 2 ) only hand-tight to begin with. Lift the chain ( 9 ) over the sprocket ( 8 ). CAUTION: Do not insert the chain between the chain sprocket and the disc. Guide the chain from above about halfway into the gro[...]

21 STOP 2 4 Checking the chain tension The tension of the chain is correct if the chain rests against the bottom side of the guide bar and can still be easily turned by hand. While doing so the chain brake must be released. Check the chain tension frequently - new chains tend to get longer during use! When checking the chain tension the engine must[...]

22 5 7 6 1 2 3 5 4 STOP Lift the chain ( 6 ) over the sprocket ( 5 ). CAUTION: Do not insert the chain between the chain sprocket and the disc. Guide the chain from above about halfway into the groove ( 7 ) on the guide bar . CAUTION: Note that the cutting edges along the top of the chain must point in the direction of the arrow! Mounting the guide[...]

23 6 8 2 9 3 2 10 STOP 2 4 Pull the chain ( 6 ) around the sprocket nose ( 8 ) of the guide bar in the direction of the arrow . Replace the sprocket guard ( 3 ). IMPORT ANT : Lift the saw chain over the chain catcher (9). T ighten the nuts ( 2 ) only hand-tight to begin with. T ensioning the saw chain T urn the QuickSet chain tensioner ( 10 ) to th[...]

24 1 2 3 4 7 9 8 6 5 STOP Mounting the guide bar and saw chain Place the saw on a stable surface and perform the following work steps in order to install the guide bar and saw chain: Release the chain brake by pulling the hand guard ( 1 ) in direc- tion of arrow . Fold up the sprocket guard quick tensioner ( 2 ) (see also the illustration on tensio[...]

25 8 10 12 1 1 4 3 2 15 Pull the chain ( 8 ) around the sprocket nose ( 10 ) of the guide bar in the direction of the arrow . Line up the holes in the sprocket guard ( 4 ) with the pins ( 1 1 ). T urn the chain tensioning screw ( B / 3 ) to get the chain tension- ing pin ( 12 ) aligned with the hole in the guide bar . Push the sprocket guard ( 4 ) [...]

26 1 2 1 Checking the chain tension The tension of the chain is correct if the chain rests against the bottom side of the guide bar and can still be easily turned by hand. While doing so the chain brake must be released. Check the chain tension frequently - new chains tend to get longer during use! When checking the chain tension the engine must be[...]

27 Chain oil Use an oil with adhesive additive for lubricating the chain and guide bar . The adhesive additive prevents the oil from being ung off the chain too quickly . We recommend the use of chain oil which is bio-degradable in order to protect the environment. The use of bio-degradable oil may even be required by local regulations. The chai[...]

28 STOP Refuelling FOLLOW THE SAFETY PRECAUTIONS! Be careful and cautious when handling fuels. The engine must be switched off! Thoroughly clean the area around the caps, to prevent dirt from getting into the fuel or oil tank. Unscrew the tank cap (use the universal wrench if necessary , see illustration) and ll tank with fuel mixture or saw cha[...]

29 2 3 1 + - STOP Checking the chain lubrication Never work with the chain saw withoute sufcient chain lubri- cation. Otherwise the service life of the chain and guide bar will be reduced. Before starting work check the oil level in the tank and the oil feed. Check the oil feed rate as described below: Start the chain saw (see „Starting the en[...]

30 STOP 1 4 5 3 2 STOP ON Starting the engine Do not start the chain saw until after it is completely as- sembled and checked! Move at least 3 meters / 10 feet away from the place where the chain saw was fuelled. Make sure you have a secure footing, and place the saw on the ground in such a way that the guide bar and chain are not near anything. Ac[...]

31 7 8 Working in winter In order to prevent carburetor icing in conditions of low tempe- rature combined with high humidity , and below + 40°F (+ 5°C) in order to get up to operating temperature faster , heated air can be taken from the cylinder . Remove the cover (see “Cleaning the air lter”). Remove the insert ( 7 ) and insert it as sho[...]

32 S H L SER VICE Adjusting the carburetor CAUTION: Carburetor adjustment may only be done by a specialist DOLMAR service center! Do not undertake any adjustments to adjusting screws (H) and (L) without a tachometer! Incorrect adjustment can lead to engine damage! A tachometer is needed for adjustment s to adjustin g screws (H) and (L), because if [...]

33 α α β β min. 0.11” (3 mm) STOP The sharpening angle (α) must be identical for all cutters! 30° for chain type 092, 484 The teeth will have the proper angle (ß) automatically if the proper round le is used. 80° for chain type 092, 484 Different angles result in a roughly , irregularly running chain, increase wear and tear and cause c[...]

34 1 2 4/5 Chain typ 484 (.325") Chain typ 092 (3/8") Files and how to work with them Use a spe cial saw chain round le for shar peni ng. Standar d round les are unsuitable. For the order number , see “Accessories”. T ype 484 : File the rst cutter half with a 3/16” (4,8 mm) dia. round saw-chain le, then switch to a 1 1/6[...]

35 Cleaning the inside of the sprocket guard CAUTION: Before doing any work on the guide bar or chain, always switch off the engine and pull the plug cap off the spark plug (see „Replacing the spark plug“) . Always wear protective gloves! CAUTION: Start the chain saw only after having assembled it completely and inspected. Remove the sprocket g[...]

36 8 12 1 1 9 Check the sprocket before mounting a new chain. Worn out sprockets ( 8 ) may damage the new chain and must therefore be replaced. Remove the sprocket guard (See „PUTTING INTO OPERA- TION“). Remove the chain and guide bar . Remove circlip ( 9 ). CAUTION: The circlip will pop out of the groove. When removing it, hold your thumb agai[...]

37 Cleaning the air lter 1 2 7 3 4 5 3 4 6 CAUTION: T o prevent eye injury , always wear eye protectio n when cleaning the lter with compressed air! Do not use fuel to clean the air lter . Unscrew the hood lock ( 1 ) counter-clockwise and remove the hood ( 2 ). Push up the combination switch ( 3 ) (Choke position) to prevent dirt particles[...]

38 1 1 12 13 STOP Replacing the spark plug CAUTION: Do not touch the spark plug or plug cap if the engine is running (high voltage). Switch off the engine before starting any maintenance work. A hot engine can cause burns. Wear protective gloves! The spark plug must be replaced in case of damage to the insulator , electrode erosion (burn) or if the[...]

39 1 2 9 4 10 12 1 1 7 8 6 5 13 3 14 Replacing the starter cable/ Replacing the return spring pack/Replacing the starter spring Unscrew four screws ( 1 ). Remove fan housing ( 2 ). Remove the air guide ( 3 ) from the fan housing. CAREFUL! Injury hazard! Do not unscrew screw (7) if the return spring is under tension. If the starter cable is to be re[...]

40 16 Replacing the fuel lter The felt lter ( 16 ) of the suction head can become clogged. It is recommended to replace the suction head once every three months in order to ensure unimpeded fuel ow to the carburetor . T o remove the suction head for replacement, pull it out through the tank ller neck using a piece of wire bent at one en[...]

41 General Chain saw Clean exterior , check for damage. In case of damage, have repaired by a qualied service center immediately Saw chain Sharpen regulary , replace in good time 33-34 Chain brake Have inspected regularly at an authorized service center Guide bar Turn over to ensure even wear of bearing surfaces Replace in good time 21,35 Starte[...]

42 Service, spare parts and guarantee Maintenance and repair The maintenance and repair of modern engines as well as all safety devices require qualied technical training and a special work - shop equipped with special tools and testing devices. Any work not described in this Manual may be performed only by a DOLMAR service center . The DOLMAR s[...]

43 T rouble shooting Malfunction System Observation Cause Chain does not run Chain brake Engine runs Chain brake actuated. Engine does not start or Ignition system Ignition spark Malfunction in fuel supply system, com- only with difculty pression system, mechanical malfunction. No ignition spark ST OP sw itc h in p os it io n, f au lt o r s ho r[...]

44 Extract from the spare parts list Use only original DOLMAR parts. For repairs and replacement of other parts, see your DOLMAR service center . PS-351 PS-421 17 24 8 9 7 10 22 20 6 5 19 1 2 3 14 18 13 11 12 21 23 4 15 16 26 33 27 28 29 30 31/32 25[...]

45 Extract from the spare parts list Use only original DOLMAR parts. For repairs and replacement of other parts, see your DOLMAR service center . Pos. DOLMAR-No. Qty . Denomination 1 412 030 661 1 Sprocket nose bar 3/8”, 12” (30 cm) 412 035 661 1 Sprocket nose bar 3/8”, 14” (35 cm) 412 040 661 1 Sprocket nose bar 3/8”, 16” (40 cm) 1 412[...]

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48 Specications subject to change without notice Changements sans préavis Form: 995 701 380 (7.1 1 GB ) DOLMAR POWER PRODUCTS PO Box 5007 Alpharetta GA 30005-5007 The engine exhaust from this product contains chemicals known to the State of California to cause cancer , birth defects or other reproductive harm.[...]